2026 Cadillac CT4 Problems
Owner-reported complaints filed with NHTSA, grouped by component
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What this page shows
Everything below is an owner-reported complaint submitted to NHTSA about the 2026 Cadillac CT4, grouped by the component NHTSA recorded on the report. These are not confirmed defects, and they are not recalls. NHTSA does not verify most reports before publishing them, and a category with more reports in it is not evidence that a part is defective.
Complaints are reports submitted by owners and drivers to NHTSA. They are not verified and do not establish that a defect exists.
Reports by component
Ranked by how many owner reports name each component category
- Driver assistance150.0%
- Electrical150.0%
Percentages are of component mentions. A single complaint can name more than one component, so these do not sum to the total complaint count.
Each component in detail
What the reports in each category say, in the owners' own words
Driver assistance
Reports naming forward-collision avoidance, lane keeping, back-over prevention, cruise control and related electronic driver-assistance systems.
From owner reports, verbatim
On or about XXX, I was the authorized subscriber and driver of a 2026 Cadillac CT4 owned by Flexcar, VIN [XXX]. While driving near [XXX] and [XXX], multiple dashboard warning lamps suddenly illuminated and a brake-assist warning appeared. The braking response became abnormally stiff or limited, and I nearly rear-ended another vehicle. The suspected systems are the service-brake/brake-assist system and the vehicle’s electrical or electronic-control system. The exact cause is UNKNOWN. There was no separate advance warning immediately before the incident; the warning lamps and brake-assist message appeared when the malfunction began. I photographed the illuminated dashboard. A similar event had previously occurred in this vehicle, and I experienced substantially similar symptoms in another Cadillac CT4 supplied by Flexcar. I immediately reported the incident, stopped driving and followed Flexcar’s towing and return instructions. The vehicle is now in Flexcar’s possession and may be available for inspection through Flexcar, but access is outside my control. Flexcar states that it inspected and tested the vehicle but could not reproduce the condition. Flexcar has not provided diagnostic codes, technician findings, the inspection facility or detailed test results. To my knowledge, no authorized Cadillac dealership, manufacturer representative, police agency, insurer or independent service center has inspected or confirmed the malfunction. I opened a case with Cadillac Customer Assistance, but Cadillac has not inspected the vehicle. The intermittent malfunction affected braking response and created an immediate collision risk to me and other road users. The dashboard photographs document that the warning condition occurred despite Flexcar’s later inability to reproduce it. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
Too few reports in this category for a page of its own — they appear in the full complaint list.
Electrical
Reports naming the electrical system — wiring, battery, charging, control modules, infotainment and electrical accessories.
From owner reports, verbatim
On or about XXX, I was the authorized subscriber and driver of a 2026 Cadillac CT4 owned by Flexcar, VIN [XXX]. While driving near [XXX] and [XXX], multiple dashboard warning lamps suddenly illuminated and a brake-assist warning appeared. The braking response became abnormally stiff or limited, and I nearly rear-ended another vehicle. The suspected systems are the service-brake/brake-assist system and the vehicle’s electrical or electronic-control system. The exact cause is UNKNOWN. There was no separate advance warning immediately before the incident; the warning lamps and brake-assist message appeared when the malfunction began. I photographed the illuminated dashboard. A similar event had previously occurred in this vehicle, and I experienced substantially similar symptoms in another Cadillac CT4 supplied by Flexcar. I immediately reported the incident, stopped driving and followed Flexcar’s towing and return instructions. The vehicle is now in Flexcar’s possession and may be available for inspection through Flexcar, but access is outside my control. Flexcar states that it inspected and tested the vehicle but could not reproduce the condition. Flexcar has not provided diagnostic codes, technician findings, the inspection facility or detailed test results. To my knowledge, no authorized Cadillac dealership, manufacturer representative, police agency, insurer or independent service center has inspected or confirmed the malfunction. I opened a case with Cadillac Customer Assistance, but Cadillac has not inspected the vehicle. The intermittent malfunction affected braking response and created an immediate collision risk to me and other road users. The dashboard photographs document that the warning condition occurred despite Flexcar’s later inability to reproduce it. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
Too few reports in this category for a page of its own — they appear in the full complaint list.
Higher-selling and older vehicles accumulate more reports. Counts are not failure rates and are not directly comparable between vehicles that sold in very different numbers.
Elsewhere on this vehicle
Data sources
- NHTSA Office of Defects Investigation — owner-reported complaints and the components recorded on them
Data on this page last refreshed .